(v.) to stay alive or continue to exist
survive
(adj.) at risk of becoming extinct
endangered
(n.) the total number of plants, animals, or people living in a certain place
population
(n.) a thing that succeeds or works well
success
(n.) a member of your family connected by blood or marriage
relative
(v.) to know and understand the existence or importance of something
recognize
(n.) the natural environment of an animal or plant
habitat
(v.) to present a danger to
threaten
(n.) a person who takes care of a person, place, or thing
caretaker
(v.) to continue on with great difficulty or effort
struggle
(adj.) causing or capable of causing damage or harm
harmful
(n.) something valuable that is found in nature and is used by animals or humans, such as food, minerals, trees, water, etc.
resource